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Summary of Significant Accounting Policies (Tables)
3 Months Ended
Jan. 31, 2017
Accounting Policies [Abstract]  
Warranty Accrual

Following is a tabular reconciliation of the changes in the warranty accrual for the three-month period ended January 31:

 

    2017   2016
Beginning balance   $ 65,000     $ 70,000  
Warranty service provided     (28,392 )     (8,031 )
New product warranties     33,186       29,887  
Changes to pre-existing warranty accruals     (4,794 )     (21,856 )
Ending balance   $ 65,000     $ 70,000